197327881 has 2 divisors, whose sum is σ = 197327882. Its totient is φ = 197327880.

The previous prime is 197327873. The next prime is 197327887. The reversal of 197327881 is 188723791.

197327881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110670400 + 86657481 = 10520^2 + 9309^2 .

It is a cyclic number.

It is not a de Polignac number, because 197327881 - 2³ = 197327873 is a prime.

It is a super-2 number, since 2×197327881² = 77876585239900322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (197327887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98663940 + 98663941.

It is an arithmetic number, because the mean of its divisors is an integer number (98663941).

Almost surely, 2^197327881 is an apocalyptic number.

It is an amenable number.

197327881 is a deficient number, since it is larger than the sum of its proper divisors (1).

197327881 is an equidigital number, since it uses as much as digits as its factorization.

197327881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 46.

The square root of 197327881 is about 14047.3442685797. The cubic root of 197327881 is about 582.1874206950.

The spelling of 197327881 in words is "one hundred ninety-seven million, three hundred twenty-seven thousand, eight hundred eighty-one".